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Hi again Dunk, If by a physical wall, you mean that you ran out of
azimuthal adjustment, do an initial rough alignment with a compass, so you know you are within a few degrees before you start; making sure the azimuth adjustment is roughly mid way. If that is not what you meant,
please forgive the gratuitous advice . Incidentally, I usually need seven
or eight iterations to get it down to a minute or two, or maybe nine or ten
to get down to a few seconds. A few seconds allows me to get subs of
around 90- 120 secs. probably around 60-90 for you.
raymo
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